Finding the Fourth Proportional to 2,338.65, 3,227.33 and 1,290.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,338.65 : 3,227.33 = 1,290.70 : x
2. Step 2: Convert to fraction form
   2,338.65/3,227.33 = 1,290.70/x
3. Step 3: Cross multiply
   2,338.65x = 3,227.33 × 1,290.70
4. Step 4: Simplify right side
   2,338.65x = 4,165,522.09
5. Step 5: Solve for x
   x = 4,165,522.09/2,338.65
6. Step 6: Final answer
   x = 1,781.17